https://thelinuxforum.com/forum/general-linux-forums/getting-started-with-linux/8079-what-is-the-24-hour-rule-for-lufthansa–1-866-829-1005

https://thelinuxforum.com/forum/general-linux-forums/getting-started-with-linux/8079-what-is-the-24-hour-rule-for-lufthansa-%E3%80%90-1-866-829-1005%E3%80%91